Carbon-based solid acid Fenton carrier as well as preparation method and application thereof

A carbon-based solid acid and carrier technology, applied in chemical instruments and methods, physical/chemical process catalysts, oxidized water/sewage treatment, etc., can solve problems such as increased treatment costs and secondary pollution, and achieve fast reaction speed and expansion Range, effect of maintaining acidity

Active Publication Date: 2014-08-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The homogeneous Fenton system must operate effectively at a low pH value (pH=3); and the presence of a large amount of iron ions leads to a large amount of iron sludge deposition after the reaction, which increases the treatment cost and causes secondary pollution Problem, the present invention provides a carbon-based solid acid Fenton carrier and its preparation method and application, which can prepare a carbon-based heterogeneous Fenton carrier material with solid acid characteristics, which is widely used in the field of water treatment

Method used

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  • Carbon-based solid acid Fenton carrier as well as preparation method and application thereof
  • Carbon-based solid acid Fenton carrier as well as preparation method and application thereof
  • Carbon-based solid acid Fenton carrier as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh 39.6g of D-glucose and dissolve it in 200ml of pure water to obtain an aqueous solution of glucose, which is placed in a high-temperature and high-pressure reactor. Placed in a constant temperature box at 180°C for 15 hours, cooled to room temperature, washed with deionized water and absolute ethanol three times, then stored with absolute ethanol, and dried in a vacuum oven to obtain carbon materials.

[0028] (2) Add carbon material powder (about 30ml) into 300ml concentrated sulfuric acid, stir and react in an oil bath at 150°C under N2 gas for 15h. After cooling to room temperature, slowly add deionized water, let it stand for 20min and then precipitate, pour Remove the supernatant, wash the precipitate repeatedly with deionized water higher than 80°C until no SO42- is detected in the supernatant, dry the precipitate, and grind to obtain a black sulfonated carbon material solid acid.

[0029] (3) Weigh 80.8g of ferric nitrate and dissolve it in 200ml of pur...

Embodiment 2

[0037] (1) Weigh 29.7g of D-glucose and dissolve it in 200ml of pure water to obtain an aqueous glucose solution, which is placed in a high-temperature and high-pressure reactor. Place in a constant temperature box at 190°C for 15 hours, cool to room temperature, wash with deionized water and absolute ethanol three times, then store with absolute ethanol, and dry in a vacuum oven to obtain carbon materials.

[0038] (2) Add carbon material powder (about 25ml) into 250ml concentrated sulfuric acid, stir and react in an oil bath at 140°C under N2 gas for 15h. After cooling to room temperature, slowly add deionized water, let it stand for 20min and then precipitate Discard the supernatant, and wash the precipitate repeatedly with deionized water above 80°C until no SO can be detected in the supernatant 4 2- Dry the precipitate and grind to obtain black sulfonated carbon material solid acid.

[0039](3) Weigh 60.6g of ferric nitrate and dissolve it in 200ml of pure water to obta...

Embodiment 3

[0044] (1) Weigh 35.6g of D-glucose and dissolve it in 100ml of pure water to obtain an aqueous glucose solution, which is placed in a high-temperature and high-pressure reactor. Placed in a constant temperature box at 170°C for 15 hours, cooled to room temperature, washed with deionized water and absolute ethanol three times, then stored with absolute ethanol, and dried in a vacuum oven to obtain carbon materials.

[0045] (2) Add carbon material powder (about 28ml) into 280ml concentrated sulfuric acid, N 2 Stir the reaction in an oil bath at 160°C for 15 hours under atmospheric conditions. After cooling to room temperature, slowly add deionized water, let it stand for 20 minutes to precipitate, pour off the supernatant, and wash the precipitate repeatedly with deionized water higher than 80°C. until no SO was detected in the supernatant 4 2- Dry the precipitate and grind to obtain black sulfonated carbon material solid acid.

[0046] (3) Weigh 88.9g of ferric nitrate and...

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Abstract

The invention discloses a carbon-based solid acid Fenton carrier as well as a preparation method and an application thereof, and belongs to the field of water treatment material. The carbon-based solid acid Fenton carrier takes carbon as the framework and is characterized in that the percentage by weight of (-SO3H), (alpha-Fe2O3) and FeO (OH) is (1-2): (0.55-0.75): (0.75-0.95), wherein the carbon weight is 100. According to the preparation method, a carbon material is prepared firstly, a black sulfonated carbon material solid acid is then obtained and placed in (1.5-2.5) mol/L of Fe (NO)3, vacuum drying is performed after mixing, and a product is taken out for cooling which is repeated until the weight is unchanged; unloaded iron oxide is washed off by distilled water; and rinsing and drying are performed. The material has characteristics of the solid acid, can provide an acid environment required by a Fenton reaction, repeated use requirement can be met, and the acidity of a reaction environment can be maintained. Further, the problem that pH is required to be adjusted repeatedly to meet treatment and discharge requirementsof the Fenton reaction issolved.

Description

technical field [0001] The invention belongs to the technical field of water treatment materials, and more specifically relates to a carbon-based Fenton carrier material loaded with sulfonic acid and iron, a preparation method and application thereof. Background technique [0002] At present, the traditional Fenton reaction, which is relatively mature in research, belongs to the homogeneous Fenton, and is an efficient and economical advanced oxidation technology, but its shortcomings greatly limit the application range. For example, the application range of pH is narrow, and additional costs are required to adjust the pH value of wastewater; a certain amount of iron ions is required for the Fenton reaction to occur, and the iron ion catalyst cannot be recycled, and the solid-liquid separation of iron ions is required to complete the reaction. caused secondary pollution. If the iron ions and acidic groups can be immobilized without losing their activity, the disadvantages of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053C02F1/72
Inventor 任洪强陈梦天丁丽丽许柯
Owner NANJING UNIV
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